Picker-strap dog for looms



(No Model.) P. ASHBY.

y PIGKER STRAP DOG FOR LooMs. No. 569,570. Patented oet. 13, 189@ UNITEDSTATEs PATENT QEETCE.

PETER ASIIBY, OF VALLEY FALLS, RHODE ISLAND, ASSIGNOR TO THE VHITINMACHINE IVORKS, OF VHITINSVILLE, MASSACHUSETTS.

PICKER-STRAP DOG FOR LOONIS.

SPECIFICATION forming part of Letters Patent No. 569,570, dated October13, 1896.

Application filed Tune 11, 1896.

To (all whom it may concern.:

Be it known that I, PETER ASHBY, of Valley Falls, in the county ofProvidence and State of Rhode Island, have invented a new and usefulImprovement in Picker-Strap Dogs for Looms; and Ihereby declare that thefollowing is a full, clear, and exact description of the saine,reference being had to the accompanying drawings, forming part of thisspecification. f

In a leoni for Weaving cloth the shuttle by which the weft is laid isdriven through the open shed ofthe Warp by ineans of the pickerstick.This stick usually starts the shuttle out of the shuttle-box and then bygiving to the shuttle a sudden blovT sends it across the width of thefabric into the opposite shuttlebox. This is usually etfectcd bythe useof a cani which bears against the picker-roll turning on a pin extendingfrom an arm of the pickershaft, thereby partially turning thepicker-shaft until a sudden projection of the cani strikes thepicker-roll and gives to the picker-shaft the sharp sudden turn which,transmitted to the picker-stick, gives the sudden blow to the shuttle bywhich it is sent across the fabric. The picker-shaft is provided With anarm, on the outer end of which the dog is secured. A picker-strapconnects the dog with thev picker-stick. The arm on the picker-shaft hasalso been connected with the pickerstick by the picker-strap Without theuse of the dog. The arm on the pickershaft, which for convenience I maycall the picker-arm, swings in a vertical plane and thus changes theangle of the surface on the arm or on the dog against Which the loop ofthe picker-strap bears, so that at the time when the blow is exerted thestrap bears only at one edge on the picker-arm or the dog. These sharpblows soon Wear and weaken this part of the loop of the picker-strap,and in power-loonis ruiming at the high speed nonY used the loop of thepicker-strap connected with the picker-arm Wears out very rapidly,thereby causing the stoppage of the looln and the renewal of this partof the pickerstrap.

The object of this invention is to prevent this local Wearing of theloop by so constructing the dog that at the time when the blow is SerialNo. 595,097. (No model.)

given and the full force exerted the loop will bearv on the dog fairlyand along its Whole Width.

Figure l is a view showing the connection 0f the picker-arm with thepicker-stick in the relative positions when the picker-stick has beendrawn fully back by the picker-stick spring. Fig. 2 is an enlarged Viewshowing the dog secured to the Vpicker-arm, theloop 6o of thepickerstrap being shown in section and the position of the picker-armbeing the same as in Fig. l when no strain is exerted on thepicker-strap. Fig. 3 is an enlarged view showing the picker-arm, thedog, and the loop of the picker-strap in the position when theprojection on the cani strikes the picker-roller and the force istransmitted by the picker-strap to the picker-stick to send the shuttleacross the fabric and the loom. 7o The loop of the picker-strap is shownin section and shows the surface bearing on the dog the Whole Width ofthe strap. 4 is a transverse sectional View of the dog.

In the drawings, 5 indicates the picker- 75 arm; G, the picker-stick; 7,the dog secured to the free end of the picker-arm. The dog 7 consists-ofthe face-plate 7', in the center of which the clamp-screw 8 is securedby screwthreaded engagement. From the upper end 8o of the plate 7 thebracket 72 projects and from the lower end the bracket 73. Both of thesebrackets are slotted for the reception of the pickerarin 5. The bracket7 3 is longer than the bracket?. The ends of the brackets 72 and 73 areconnected by the strap-bar 74, Which forins an angle of less than ninetydegrees or right angle with the bracket 73 and an angle of more thanninety degrees With the bracket 72, the angular position of the 9ostrap-bar 74 being such that the strap bears its Whole Width on the barwhen the greatest strain on the strap is exerted.

In practice I find that the strap-bar '74, when inclined at an angle ofabout twenty degrees to the picker-bar, will forni a fair bearing on theloop, but I do not Wish to confine myself to any particular angle, asthe same may be varied to the oscillation of the Y picker-arm. The loop9 extends through the. roo dog and is connected with the loop 10 by thelink 11. This construction allows some ad- Patent- A piek-strap dog:comprising upper and lower members havmg opemngs to reeelve Jchepicker-arm, a connecting-plate for the rear ends of said members, and aninclined strap-ber connecting the forward ends of the members, togetherwith a, clamping device carried by the oonneeting-plate, whereby thepick-strap dog; may be secured to a pieker- In Witness whereof l havehereunto setmy hand.

PETER ASHBY. Witnesses:

JOSEPH A. MILLER, Jr., M. F. BLIGH.

